Observed Signal · Jun 25, 2026 · Policy Update · Source: t3n · Impact: 4/5 · Sentiment: Neutral
Anthropic Accuses Alibaba of Massive Data Theft
Anthropic accuses Chinese conglomerate Alibaba of a large-scale effort to illicitly extract capabilities from its AI software Claude, citing nearly 29 million interactions from about 25,000 fraudulent accounts between late April and early June. In a letter published by the Financial Times, Anthropic urged the US Congress to take measures to prevent such attacks, including tighter restrictions on Chinese firms, permission for US AI companies to warn one another, and limiting Chinese access to AI chips. Alibaba did not immediately respond. The report also notes Anthropic is currently in dispute with the US government after authorities forced the temporary removal of its AI product Fable 5 from the market amid security concerns.
Allegations of large-scale model-extraction and a formal appeal to the US Congress could prompt regulatory action or export-control responses that affect AI R&D, cross-border access to AI hardware, and governance norms for foundational models.
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Key Takeaways & Evidence Grounding
- Anthropic accused Alibaba of a large-scale attempt to illicitly extract capabilities from its AI software.
- According to Anthropic's letter, attackers tied to Alibaba used nearly 25,000 fraudulent accounts to interact almost 29 million times with Anthropic's AI model Claude from late April to early June.
- Anthropic asked the US Congress to enact measures including stricter action against Chinese companies using model distillation, the right for US AI firms to warn each other, and tighter limits on Chinese access to AI chips.
- Alibaba initially did not comment on the allegations.
- Anthropic is engaged in a separate dispute with the US government that led to the temporary market removal of its AI product Fable 5; negotiations with authorities are ongoing.
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Anthropic Accuses Alibaba of Spying on Claude
Anthropic has told U.S. senators it believes attackers linked to Alibaba tried to illicitly extract capabilities from its Claude model via so‑called "distillation" attacks. In a letter published by the Financial Times, Anthropic alleges nearly 25,000 fraudulent accounts accessed Claude almost 29 million times between late April and early June to learn about the model's structure and task logic. Anthropic is calling for stronger U.S. laws to prevent such attacks, permission for American AI firms to warn one another, and tighter limits on Chinese access to AI technologies (including chips). Alibaba has not commented. The piece also notes related industry context: Elon Musk admitted using distillation for his Grok chatbot and Anthropic recently faced U.S. government action requiring the temporary removal of its Fable 5 software from the market.
Anthropic Accuses Alibaba of Illicit AI Distillation
Anthropic sent a June 10 letter to the U.S. Senate Committee on Banking, Housing, and Urban Affairs accusing Alibaba and operators tied to its AI lab of carrying out what Anthropic called “the largest known distillation attack on Anthropic to date.” According to the letter (viewed by CNBC), Anthropic says the campaign involved about 28.8 million exchanges with its models using roughly 25,000 fraudulent accounts between April 22 and June 5. The story follows a White House OSTP memorandum on industrial‑scale distillation and comes as Anthropic complies with a U.S. export control directive that suspended foreign access to its Claude models (Fable 5 and Mythos 5). Anthropic has previously identified other industrial‑scale distillation campaigns from labs named DeepSeek, Moonshot and MiniMax.
Alibaba bans Anthropic AI after distillation attack claim
Alibaba has ordered employees to stop using Anthropic’s AI tools for work and placed Anthropic’s Claude Code on a high-risk software list, effective July 10, 2026. The move follows Anthropic’s allegation — made in a letter to the U.S. Senate Committee on Banking, Housing and Urban Affairs in June — that Alibaba attempted to extract its AI capabilities via what Anthropic called the largest known "distillation attack." Anthropic’s terms of service prohibit Chinese companies and other "adversarial nations" from using its models. Alibaba reportedly requires staff to uninstall Anthropic models and agent products and instead use the company's own AI assistant, Qoder. The companies declined to comment. The action comes amid online backlash and reporting that some Chinese firms had accessed Claude through third-country workarounds.
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